Fastening inserting machine



P 1937. F. N. LA CHAPELLE 2,092,078

FASTENING INSERT IN G MACHINE Filed Jan. 16, 1954 2 Sheets-Sheet 1 l/E/VTUEL nwKM 3W F. N. LA CHAPELLE 2,092,078

FASTENING INSERTING MACHINE Sept. 7, 1937.

2 Sheets-Sheet 2 Filed Jan. 16, 1934 Patented Sept. 7, 1937 FASTENINGINSERT-ENG MACHINE Application January 16, 1934, Serial No. 706,887 6Claims. (01. 1-41 This invention relates to fastening inserting machinesand is illustrated herein as embodied in a machine particularly adaptedfor all-round nailing in the manufacture of boots and shoes. Machinesused for all-round nailing in the manufacture ofboots and shoes, or forany nailingoif the last in'which it is desired to clench the nails uponthe insides of the shoes, are com- A monly provided with a work support,for example, a horn having a clenching cavity in its work engagingsurface. Such machines, while they ordinarily clench nailssatisfactorily, may, under some conditions, deflect the points of thenails outwardly toward the edge of the shoe, causing the nails topenetrate the shoe upper with consequent damage and injuryto the shoe.Even when the nails are perfectly clenched on the inside of the shoe theclenched ends of the nails may extend in different directions with theresult that the inside of the shoe does not present a n'ea-tfinishedappearance. Furthermore, in such machines the clenching cavities arelocated'at or near the center at thetip of the horn and the nailingoperation therefore must ordinarily take place a substantial distancefrom the edge of the horn, thus locating the nails a substantialdistance from the edge of the insole which may,

during wear of 'the shoe, permit the edge-of the insole to curl, therebycausing discomfort to the wearer.

It'is an object of the present invention to provide a fasteninginserting machine having an improved clenching vmechanism organized toclench all the fastenings in substantially the same direction and nearthe edge of the inside of the shoe. In the operation of the illustratedmachine this is accomplished by-providing an' anvil having a clenchingsurface located near the edge of the anvil with the center of saidsurface being offset from the axis of rotation of the support on whichit is mounted and arranged to remain stationary relatively to thefastening inserting instrumentalities of the machine in order that thepoints of the nails may strike the clenching surface at a predeterminedpoint, thereby causing the fastening to be clenched in a predetermineddirection. In the illustrated machine the work support is rotatablymounted on the frame of the machine in order that the tip 50 of the worksupport may reach all parts of the inside of the shoe and the hornbutton is maintained in a predetermined position relatively to i thefastening inserting mechanism by gear connections to the frame of themachine.

5 With the above and other objects and features in View the inventionwill now be described in connection with the accompanying drawings,which show a machine constituting a-preferred embodiment of theinvention, and pointed out in the accompanying claims. It should beunderstood, 5 however, that the machine may be modified in variousrespects Within the scope of the claims withoutdeparting from theinvention.

In the drawings,

Fig. 1 is a View in side elevation of a portion 10 of afasteninginserting machine embodying the present invention Fig. 2 isasectionalview taken along the line II-II of Fig. l; a

Fig. 3 is a sectional View on an enlarged scale 15 of a portion of thehorn with the parts in the position shown in Fig. 1;

"Fig. 4-is a View in side elevation of a portion of the horn showing therelative position of the parts after the horn has been rotated substan-20 tially 180;

Fig. 5 is'a detail plan view of the end of the horn;

'- Fig. 6 is an enlarged detail view in front elevation of a portion ofthe horn and the fastening 25 inserting instrumentalities;

Fig. 7 is an enlarged detail view showing the position of the born whenoperating about the toe end of a shoe; and

Fi'gfiB is a similar view showing the horn op- 30 erating adjacent toa'longitudinal edge of the shoe. x a

The illustrated machine is of the general type disclosed in UnitedStates Letters Patent No. 1,030,775, granted June 25, 1912, on anapplication filed in the name of George Goddu. The machine mayadvantageously be equipped, if desired, with a horn'pressure relievingmechanism such as that disclosed, for example, in United States LettersPatent No. 1,686,808, granted Oc- 40 tober 9,- 1928,-on an applicationfiled in the names of George Goddu and Fred L. Mackenzie. Reference maybe had to these patents for a full disclosure of such parts of themachine as it is unnecessary to illustrate or describe herein.

The illustrated machine is provided with a head lll mou nted one column(not shown). The head I0 is provided with mechanism for operating thefastening inserting instrumentalities of the machine. An awll2'is'reciprocated through connections including a link it to a bellcrank lever lfi'which carries at one end a cam roll arranged to ride inacam track Ill. The awl I2 is mounted formovementtoward the work to formfastening receiving holes. and is also arranged for move- 5 mentparallel to the edge of the Work to move the fastening receiving holesinto alinement with the path of movement of a fastening inserting memberor driver 26. The driver 20 is arranged for reciprocating movementtoward and from the work through connections to a cam in the mannerdisclosed in said Letters Patent.

The column of the machine also carries a work support or horn 2|terminating in an anvil 24 which is arranged to support a work piece,for example, a shoe 26 with its sole 28 in engagement with a presserplate or abutment BDcarried by l the head of the machine. The positionof the shoe relatively to the fastening inserting instrumentalities ofthe machine may be determined, if desired, by the use of any suitablegage which may also be secured to the head In of the :machine.

Referring now to Figs. 5, 7 and 8 of the drawings, it will be noted thatthe anvil 24 is illustrated as provided with anelongated relativelysmall and narrow clenching cavity 32. The clenching cavity is providedwith side walls 33 and 35 which extend substantially parallel to thefeed of the work in order that the direction of clench will besubstantially parallel to the edge of the shoe. The clenching cavity isformed adjacent to the edge of the anvil. 24 to permit the fastenings tobe driven as close to the edge of the shoe as is possible andconsequently the center of the clenching cavityis offset with respect tothe axis of rotation of the horn 2|. By the use of this construction theclenching cavity may be'made relatively small and effective clenching ofthe fastenings will be insured. The clenching cavity 32 is arranged todeflect the ends of the fastenings in a direction parallel to thefeeding movement of the awl l2, wherefor the direction of the clench ofthe fastenings may be said to be predetermined with respect to the edgeof the shoe or other work piece. The horn or support 2| is firmlysecuredby clampingscrews 38 to the upper end of a horn post 34 which isrotatably mounted in an upstanding portion or' projection 36 of thecolumn of the machine. The lower end of the horn post 34 is connected tomechanism for raising and lowering the horn between successive feedingmovements of the awl |2 in the manner described in the,abovementionedLetters Patent;

In order that the nails or other fastenings shall be clenched in onedirection, the position of the clenching cavity 32 relatively to thedriver 2|] must be constant. That is to say, the clenching cavity mustbeso located at all times with rrespect to the driver that the end of thefasten ing inserted by the driver will strike substantially the sameportion of the surface of the cavity 32.. When the end of the fasteningstrikes the inclined surface of the clenching cavity 32, it

is deflected toward the deepest portion of the cavity. The direction ofclench is thuscontrolled primarily by the location of the deepestportion 7 .;deflected toward the right in the manner shown,

for example, in Fig. '7. It is to be noted, that, as

shown, the center of the deepest portion'of the clenching cavity islocated to the right of the line of drive of the fastening but it isevidentthat thelocation of the center of the clenching cavity could belocated in other positions relatively the horn may reach all parts ofthe inside of the shoe. Referring now particularly to Fig. 3, it will benoted that the horn button 24 is provided with a stem or stub shaft 40which fits into a bearing formed adjacent to the tip of the work support2|. The lower inside portion of the horn button 24 is provided with gearteeth 4| which mesh with gear teeth 43 formed on the end of a shaft 42.The horn button 24 is rotated relatively to the horn 2| by means of theshaft 42 which is connected by an epicyclic train of gears to the frameof the machine. The axis of rotation of the horn button 24 must becoincident with, or in alinement with, the axis of rotation of the horn2| as will later become apparent. In order to reduce friction betweenthe horn button 24 and the horn 2| a ball bearing unit 44 is interposedbetween the lower. portion of the horn button 24 and the tip of the horn2|.

v A gear 46 is secured to the portion 36 of the column of the machineand is held immovablyin place. Meshing with the gear 46 isv an idlergear 48 rotatably mounted on a stub shaft 49 mounted in the support 2|.In order that the gear 48 may conveniently be removed whenever it is.

necessary to make adjustments or to replace worn or broken parts, thegear is held in operating position by means of a stud 56which engages anenlarged end portion 53 of the stub shaft 49 and which is threaded'intoand through a laterally extending portion 52 of the work support 2| Thestud is locked in position by means of a lock nut 54. The gear 48 isrelatively long to permit the relative vertical movement between thegear 46 and the gear 48. This is necessary in order that the gears 46and 48 remain in mesh when the horn is raisedand lowered be.- tweenfeeding movements of the awl l2.

The gear 48 meshes with va'gear 56 formed on the lower end of a shaft 58whichis mounted in a bearing59 in a vertical portion of the horn 2|.,The upper end of the shaft 58 is provided with a bevel gear 60 which inturn meshes with a bevel gear 62 formed on the lower end of the shaft.The gear 60 is provided with a collar 6| through which passes a pin 63forsecuring the gear, 60 to the shaft 52., The lower face of;

the collar 6| bears against the top of the bearing 59 thus preventingdownward movement of the shaft 58. In order to eliminate excessivebinding or friction between the gears 60 and 62 a ball thrust bearing 64is interposed betweenthe gears 60 and 62, as shown in Fig. 1.

By the use of this arrangement of gears the horn button 24 remainsstationary relatively to the fastening inserting instrumentalities ofthe machine but the horn 2| is arrangedto rotate relatively to the hornbutton 24". In order to accomplish this result, the ratio between thenumber of teeth on the gear 46 and the number of teeth on the gear 56 isequal to the ratio be:

tween the number of teeth 4| formed on the lower surface of the hornbutton 24and thenumber of teeth 43 on the gear formed on the upper, end

as to fit between the gears 46 and 56.

,oflthe shaft 42. Assuming now that the horn 2| is rotated in aclockwise direction the gear- 46 being stationary will cause the gear 48which is carried by the horn 2! to rotate in a clockwise direction, andthe gear 56 meshing with the gear 48 will rotate in a counterclockwisedirection. This. counterclockwise movement is. transmitted through theshaft 58 to the gear '62 andthe shaft 42. The gear teeth formed on theupper end of the shaft 42 will rotate the horn button 24, in. acounterclockwise direction relatively to thehorn 2| but since the hornis rotated an equal angular distance in a clockwise direction therotation of the horn button 24 relatively to the driver 20 will equalzero. The horn button 24 thus remains stationary relatively to thefastening inserting instrumentalities irrespective of the rotation ofthe horn 2|. 1 i

As previously stated, in order to maintain this stationary condition ofthe horn button there must be a certain relation between the parts. Theratio between the number of teeth on the gear 46 and the teeth on thegear 56 must equal the ratio between the teeth M on the horn button 24and the teeth 43 on the upper end of the shaft 42. That is to say, ifthe gear 46 has forty teeth and the gear 55 has ten teeth the number ofteeth on the horn button 24 and on the upper end of the shaft 42 must bein the ratio of form to one. It is apparent that the ratio could bethree to one or five to one or in fact any other ratio consistent withgood design. The number of teeth on the gear 48 is immaterial but it isevident that the gear 48 must be of such a size Although the clenchingcavity 32 may be formed as a part of the horn button 24 it has beenfound to be preferable to form the clenching cavity in a separate member56. Thus, when the clenching cavity 32 has become worn a new member maybe substituted conveniently and inexpensively without necessitating theremoval of the entire horn button 24.

It is to be understood that although the horn 2| has been referred to asbeing rotatable and in fact is rotated while the fastenings are driveninto a shoe mounted on the horn the rotation of the horn is effected.not through any conscious efiorton the part of the operator but isrotated by engagement with the work to permit the tip of the horn toreach or engage the edge of the inside of the shoe, that is to say, whenfastenings are being inserted adjacent to the side of the shoe the hornwill swing an amount sufiicient to permit the edge of the anvil toengage the side of the shoe. It is important, therefore, that thefriction between the horn post and its bearings be reduced to a minimum.The upstanding projection 36 of the column of the machine, as shown inFig. 1, is provided with a bearing 12 which surrounds a portion of thehorn post 34.

, Interposed between the top of the bearing 12 and the horn 2| is aroller bearing 14 which minimizes friction between the horn post and thetop of the bearing 12. The lower end of the horn post is provided with abearing 16 which prevents radial movement of the horn post and thusprevents binding of the horn post in the bearing 12.

The present embodiment of the invention has been illustrated asclenching the ends of the fastenings substantially parallel with theedge of the shoe. It is apparent, however, that the ends of thefastenings could be clenched at substantially right angles or normal tothe edge of the shoe by changing the position of the center of theclenching cavity relatively to the horn button substantially 3 Theinvention has been described in detail and the principleand method of,operation carefully and fully discussed but it is believed to bedesirable to describe briefly the operation of the machine.

When the shoe 28 has been placed on the work support and the machinestarted, the awl I2 will move downwardly to form a fastening receivinghole in the work and then will move parallel to the bottom of the shoe.to feed the work a distance sufficient to bring the fastening receivinghole into alinement with the driver. 29. A fastening will then beinserted into the hole by the driver 24. The point of the fastening willstrike the clenching cavity and will be deflected in a predetermineddirection by the clenching cavity 34 in the horn button 24. As thefastenings are being inserted in the work the horn is rotated inlocating the shoe in operative position relatively to the fasteninginserting means but, due to the gear connections between the horn button24 and the frame of the machine, the horn button will remain stationaryrelatively to the fastening inserting instrumentalities and eachfastening, therefore, will strike the clenching cavity 32 atapproximately the same point and the point of each fastening will bedeflected in the same direction. It is to be understood that between theinsertion of successive fastenings pressure on the horn is released topermit the shoe to be fed past the driver.

Although the present invention has been described and illustrated asparticularly adapted to drive nails, it is apparent that tacks or otherdriven fastenings could be inserted and similarly clenched in onedirection, if so desired.

Having thus described my invention, What I claim as new and desire tosecure by Letters Patent of the United States is:

1. A machine for inserting fastenings having, in combination, a driver,a work supporting horn, a clenching anvil rotatably mounted on the tipof the horn, said anvil being provided with an elongated clenchingcavity extending along one edge thereof and having its deepest portionoffset from the path of movement of the driver, and means formaintaining the anvil and the clenching cavity in a predeterminedposition relatively to the driver to deflect the points of fastenings ina predetermined direction.

2. A fastening inserting machine having a driver, a rotatable worksupport, an anvil mounted on said support and provided with a relativelysmall elongated clenching cavity, the deepest portion of which is offsetfrom the line of operation of the driver, to determine the direction ofclench of the fastenings inserted by the driver, and gearing formaintaining the clenching cavity and said anvil in a predeterminedposition relatively to said driver.

3. In a fastening inserting machine, a rotatable work support, a driver,an awl adapted to punch a hole in awork piece and to feed the work pieceinto operative position with relation to the driver, an anvil carried bythe work support, and means for holding the anvil against rotation withthe support, said anvil having an inclined clenching face extendingalong the direction of the work feed.

4. A machine for inserting fastenings having a work support comprising ahorn, a fastening inserting driver, an anvil rotatably mounted upon thetip of the horn and located in alinement with the driver, the anvilhaving an inclined clenching surface bounded by straight walls, andmeans for maintaining the anvil with its clenching surface in apredetermined position relatively to said driver to insure clenching ofthe fastenings in a predetermined direction.

5. A fastening inserting machine having, in combination, a driver forinserting fastenings in a work piece, a horn rotatably mounted in themachine and arranged to extend into the inside of ashoe to support theshoe in proper relation to the driver, a horn button rotatably mountedat the upper end of said horn, said horn being provided with anelongated clenching surface having its deepest portion ofiset from theline of operation of the driver, and means interposed between themachine frame and the horn button for maintaining the horn button andthe clenching cavity in a predetermined position relatively to thedriver to deflect the points of the fastenings in the same direction forall positions ofthe horii.

6. In a fastening inserting machine, adriver for inserting fasteningsinto a work piece, an awl adapted to form fastening receiving: holes inthe work piece and to feed the work pieceto the driver, a worksupporting horn rotatably mounted in the machine for supporting thework, a horn button rotatably mounted on the end of said horn, said hornbeing provided with clenching surfaces arranged to insure that thepoints of the fastenings will be deflected in the direc-' tion of thefeed of the'work piece, and gear contherein in a predetermined positionrelatively to the driver and to the awl, thereby insuring that thefastenings will be clenched in a predetermined direction.

FRED N. LA CHAPELLE. 20

